From 1bd5344779e7d607fecdb47a2536d676fa0330ab Mon Sep 17 00:00:00 2001 From: Paul Lawrence Date: Wed, 31 Aug 2022 14:41:11 -0700 Subject: [PATCH] ANDROID: fuse-bpf: Add test for lookup postfilter Test: fuse_test passes Bug: 219958836 Signed-off-by: Paul Lawrence Change-Id: I04a68af274ecf823a96e2f0ead49f56d2f1c1452 --- .../selftests/filesystems/fuse/fuse_test.c | 60 ++++++++++++++++++- .../selftests/filesystems/fuse/test_bpf.c | 13 ++++ 2 files changed, 72 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/filesystems/fuse/fuse_test.c b/tools/testing/selftests/filesystems/fuse/fuse_test.c index 58a0dd587fec..ffc960aa6315 100644 --- a/tools/testing/selftests/filesystems/fuse/fuse_test.c +++ b/tools/testing/selftests/filesystems/fuse/fuse_test.c @@ -1911,6 +1911,63 @@ out: return result; } +static int bpf_test_lookup_postfilter(const char *mount_dir) +{ + const char *file1_name = "file1"; + const char *file2_name = "file2"; + int result = TEST_FAILURE; + int bpf_fd = -1; + int src_fd = -1; + int fuse_dev = -1; + int file_fd = -1; + int pid = -1; + int status; + + TEST(file_fd = s_creat(s_path(s(ft_src), s(file1_name)), 0777), + file_fd != -1); + TESTSYSCALL(close(file_fd)); + TEST(file_fd = s_creat(s_path(s(ft_src), s(file2_name)), 0777), + file_fd != -1); + TESTSYSCALL(close(file_fd)); + file_fd = -1; + TESTEQUAL(install_elf_bpf("test_bpf.bpf", "test_lookup_postfilter", + &bpf_fd, NULL, NULL), 0); + TEST(src_fd = open(ft_src, O_DIRECTORY | O_RDONLY | O_CLOEXEC), + src_fd != -1); + TESTEQUAL(mount_fuse(mount_dir, bpf_fd, src_fd, &fuse_dev), 0); + FUSE_ACTION + int fd = -1; + + TESTEQUAL(s_open(s_path(s(mount_dir), s(file1_name)), O_RDONLY), + -1); + TESTEQUAL(errno, ENOENT); + TEST(fd = s_open(s_path(s(mount_dir), s(file2_name)), O_RDONLY), + fd != -1); + TESTSYSCALL(close(fd)); + FUSE_DAEMON + struct fuse_entry_out *feo; + struct fuse_entry_bpf_out *febo; + + TESTFUSELOOKUP(file1_name, FUSE_POSTFILTER); + TESTFUSEOUTERROR(-ENOENT); + TESTFUSELOOKUP(file2_name, FUSE_POSTFILTER); + feo = (struct fuse_entry_out *) (bytes_in + + sizeof(struct fuse_in_header) + strlen(file2_name) + 1); + febo = (struct fuse_entry_bpf_out *) ((char *)feo + + sizeof(*feo)); + TESTFUSEOUT2(fuse_entry_out, *feo, fuse_entry_bpf_out, *febo); + FUSE_DONE + + result = TEST_SUCCESS; +out: + close(file_fd); + close(fuse_dev); + umount(mount_dir); + close(src_fd); + close(bpf_fd); + return result; +} + static int parse_options(int argc, char *const *argv) { signed char c; @@ -2017,7 +2074,8 @@ int main(int argc, char *argv[]) MAKE_TEST(bpf_test_lseek), MAKE_TEST(bpf_test_readdirplus_not_overriding_backing), MAKE_TEST(bpf_test_no_readdirplus_without_nodeid), - MAKE_TEST(bpf_test_revalidate_handle_backing_fd) + MAKE_TEST(bpf_test_revalidate_handle_backing_fd), + MAKE_TEST(bpf_test_lookup_postfilter), }; #undef MAKE_TEST diff --git a/tools/testing/selftests/filesystems/fuse/test_bpf.c b/tools/testing/selftests/filesystems/fuse/test_bpf.c index 472a02aef5b5..b47445735ab6 100644 --- a/tools/testing/selftests/filesystems/fuse/test_bpf.c +++ b/tools/testing/selftests/filesystems/fuse/test_bpf.c @@ -524,3 +524,16 @@ int readdirplus_test(struct fuse_bpf_args *fa) } return FUSE_BPF_BACKING; } + +SEC("test_lookup_postfilter") +int lookuppostfilter_test(struct fuse_bpf_args *fa) +{ + switch(fa->opcode) { + case FUSE_LOOKUP | FUSE_PREFILTER: + return FUSE_BPF_BACKING | FUSE_BPF_POST_FILTER; + case FUSE_LOOKUP | FUSE_POSTFILTER: + return FUSE_BPF_USER_FILTER; + default: + return FUSE_BPF_BACKING; + } +}